I remember the old Babylon book well.
I actually managed to place a copy one Sunday morning. I went back the following week and guess what, the guy had not read it! I never did return after that, I wonder how far he got with it.
We studied it at the group, I was the Group Study Servant and found it so difficult to make it interesting. As stated above, there was a question booklet but we had to make up our own review questions for the end of the study. My old dad used to copy my review questions for his group!
George